A トリス (diisocyanide) クロミウム (chromium) 複合物は,Fe (2,2'-Bipyridine) の発光アナログである
Laura A Büldt1, Xingwei Guo1, Raphael Vogel1
1Department of Chemistry, University of Basel , St. Johanns-Ring 19 and Spitalstrasse 51, 4056 Basel, Switzerland.
Journal of the American Chemical Society
|January 6, 2017
まとめ
新しいクロム複合体とケラティングリガンドは,発光性と顕著な安定性を示し,太陽電池と照明アプリケーションにおける貴金属に代わる地球に豊富な可能性を提供します.
科学分野:
- 有機金属化学
- 材料科学
- 写真化学
背景:
- 鉄 (II) 複合体は染料感受性太陽電池の土壌に豊富な感受性物質ですが,その興奮状態の寿命は限られています.
- 貴金属はしばしば発光装置や太陽電池に用いられ 地球に豊富にある代替品の研究に 駆り立てられています
- クロミウムのような過渡金属の低酸化状態を安定させることは困難ですが,ユニークな電子特性を提供します.
研究 の 目的:
- ビデント酸ケラティングイソシアニドリガンドによる新しいクロム ((0) コンプレックスを合成し,特徴づけること.
- 新しい複合体の光物理的特性,安定性,光還元能力を調査する.
- 技術の応用における貴金属の代替品として この地球に豊富な複合物の可能性を 探求する.
主な方法:
- メタテルフェニル骨組みを備えたバイデントケラティングリガンド (CNtBuAr3NC) の合成
- ホモレプスクロム ((0) コンプレックス,Cr ((CNtBuAr3NC) の形成.
- 発光寿命測定とトリプレット・トリプレット・アニヒレーション・アップコンバージョンの研究を含む光物理的特徴付け.
- 興奮状態の酸化力を決定する電気化学分析.
主要な成果:
- 合成されたCr{CNtBuAr3NC) 3複合体は,室温で安定して発光する.
- この複合体は,アイソエレクトロニック鉄複合体を上回る非常に長い興奮状態の寿命 (2.2ns) を表している.
- Cr(CNtBuAr3NC) 3は,他のCr(0) コンプレックスと比較して,光分解に対する強化された強度を示しています.
- 効率的なエネルギー伝達とトリプレット・トリプレット・アニヒレーション・アップコンバーションがアントラゼンで観察されました.
- 複合体は, -2. 43V対Fc+/ Fcの興奮状態酸化ポテンシャルを持つ強力な光還元剤として作用する.
結論:
- 新型バイデントケラティングリガンドは,クロミウムをゼロバルント状態で効果的に安定させる.
- Cr ((CNtBuAr3NC) 3は,発光装置および染料感受性太陽電池のアプリケーションに有望な性質を示しています.
- この研究は,貴金属の持続可能な代替品として,地球に豊富なクロム複合体の可能性を強調しています.
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